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This paper presents a hybrid parallel DC/DC converter to have the advantages of wider zero-voltage switching range, less primary circulating current and higher circuit efficiency. The proposed converter incudes two parallel full-bridge circuits shared the same lagging-leg switches to reduce the switch counts and current stresses of passive components on the secondary side. Half-bridge circuit is connected...
A 1.44 kW DC/DC converter with zero voltage switching (ZVS) for medium voltage applications is proposed in this study. Two half-bridge circuits with split capacitors are connected in series at high voltage side to limit voltage stresses of power switches at Vin/2. Three DC/DC circuits are adopted to share load current and reduce the current stress of rectifier diodes, transformers and output filter...
This paper presents a zero voltage switching (ZVS) converter with three resonant tanks to reduce switching losses on power semiconductors, to achieve primary side current sharing and to lessen transformer secondary winding with a full-wave rectifier. Three resonant converters with the same power switches are adopted at low voltage side to reduce current rating on transformer windings. Using series-connection...
A soft switching converter using low voltage and low current stresses of power components is presented for high input voltage and high output current applications. Two input capacitors and four power MOSFETs are adopted at high voltage side in order to reduce the voltage stress of power switches. Thus, the voltage stress of MOSFETs is clamped at Vin/2. Two flying capacitors are adopted at the AC side...
This paper presents a new resonant converter to achieve soft switching on power devices. Two full-bridge converters are connected in series to clamp the voltage stress of power switches at Vin/2. Thus, power MOSFETs with 650V voltage rating can be used for 1300V input voltage applications. Two flying capacitors are connected on the AC side of two full-bridge converters to automatically balance two...
The single-phase and three-phase renewable power generation system for distributed power applications are presented in the paper. The adopted system is consisted of a DC/DC converter with maximum power tracking, a full-bridge converter for isolation and DC voltage regulation and a voltage source inverter for AC power generation. The DC/DC converter is used to draw the maximum power from the renewable...
A study of the half-bridge converter to achieve zero voltage switching at turn-on is presented. The asymmetrical pulse-width modulation technique is used in the converter to regulate the output voltage and improve the duty cycle utilization. The analysis is presented for the switch stress, output filter components and rectifier diodes. The principle operation based on the mathematical analysis is...
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